the response of a plant part to the stimulus of gravity. Plant stems, which grow upwards irrespective of the position in which they are placed, show negative geotropism
Derived forms
geotropic (ˌdʒiːəʊˈtrəʊpɪk)
adjective
geotropically (ˌgeoˈtropically)
adverb
geotropism in American English
(dʒiˈɑtrəˌpɪzəm)
noun
any positive (or negative) movement or growth of a plant or sessile animal in response to (or against) the force of gravity